Pile-wire cutter



Patented Sept. 1, 1925.

UNITED STATES PATENT OFFICE.

MARCUS B. BEHRMAN, OF NEW YORK, N. Y., ASSIGNOR TO THE LOX SEAL CORPORATION,

OF BROOKLYN, NEW YORK,`A CORPORATION OF NEW YORK.

PILE-WIRE CUTTER.

-Application led April 17, 1924. Serial* No. 707,188.

To all whom t may concern.'

Be it known that MARCUS B. BEHRMAN, a citizen of the United States, and a residentl of the city and State of New York, county of Kings, has invented new and useful Improvenients in a Pile-Wire Cutter, of which the following is a specification. n

My invention relates generally to a pile cutting means for the type of looms which weave pile fabrics and more particularly to an association with the pile wires generally employed in such looms, of a cutter for cutting the loops as the pile wires are withjdrawn.

In looms which I employ pile wires, the ,warp threads are generally looped over these wires and when it is desired to produce a cut pile fabric, cutters are so associated with the pile wires that upon withdrawal of the wires from the fabric, the cut-ters will cut through the loops. Due to the rapidity with which these pile wires are thrown in and withdrawn and the number of threads to be cut upon each withdrawal each cutting edge is subject to a great number of cutting operations in a short time and therefore dulls quickly and such edges must obviously therefore be either frequently resharpened or frequently replaced.

The use of a cutter which is separable from the pile wire for permitting replacement of the blade is attended with a number of problems, among which is that any arrangement for securing the blade in posithe blade in association with the pile wire so that it will not shift therein nor will it be accidentally separated therefrom, may on the other hand so secure the blade as to render its removal dilicult and timeV consuming.

One of the important objects of my invention therefore is the provision of an arrangement whereby a cutting blade is so associated with the pile wire that while it is ixedly held in position thereon and against accidental movement, its quick and effective removal is permitted.

Looms of thetype referred to are already providedwith pile wires and it is one of the important objects of my invention to so devise the cutter and its manner of association with a pile wire that the cutter can be associated with the conventional form of pile f tion which on the one hand will serve to hold wire without requiring a replacement of thel operable, inexpensive manner of associating the blade with the pile wire so as to permit the blade on the one hand to perform its function at a maximum of effectiveness, and at the-same time to permitV of its quick removal and replacement.

For the attainment of these objects and such other objects as may hereinafter appear 4or be pointed out, I have illustrated embodiments lof the invention in the drawings whereinn Fig. `l is a side elevation of the front end of the pile wire Awith the blade or cutter shown as locked in its operative association therewith; n

Fig. 2 is a central vertical section through the outer portion of the pile wire which is illustratedk in Fig. l and illustrates the blade orl cutter in position before it is secured in its fixed association.

` Fig. 3 is a view similar to Fig. 2 showing the blade in association with the pile wire and lockedl thereto.

Fig. 4 is a top plan view of the holder portion of the pile wire cutter;

Figs. 5 and 6 illustrate modified forms of the blade; y

- Fig. 7 shows on van enlarged scale the converging portions of the channel walls.

Upon viewing the drawings, it will be observed that the forward end of the pile wire is shown.k at l() and in the illustrated embodiment is in the form of a thin strip; of sheet material bent so as to provide a channelled construction being preferably, although not necessarily, U shaped in cross section.

The space between the walls 1l and 12 is such as to freely receive therein the blade 15 to be hereinafter described more in detail and for reasons that will appeark or be pointed out shortly, the walls l1 and l2 at their outer free ends are caused to gradually increase and thenY decrease in height, as shown in the drawings, thus producing the curvedilobes or widened portions 16 and 17, the lebe 1,7 being shorter than the lobe 16. and that portion of the lobe 16 that extends beyond the lobe 17 being curved laterally at 18 acrossthe channel 14 as will be clearly understood upon observing Fig. 4 of the drawing. The blade 15 is provided with the cutting edge 21 inclined as and in the directionv shown, and has extending therefrom a projection or extension 22, and the parts are so dimensioned and arranged that while the body of the blade including the extension 22 is received preferably, although not necessarily, almost 'Wholly within the channel 14, the cutting edge 21 projects therefrom for a greaterpart of its-length and the blade is so positioned that the cutting edge has an edective cutting operation as the pile wireisi moved in the direction of the arrow in Fig. 1, which direction of movement is given the pile wire as it is Withdrawn from the fabric.'

For the purposes of locking the blade 15 in its predetermined or desired position in the holder 10, I provide a locking cam 24 mounted to swing in any desired or preferred manner as by being pivotally cai'- ried on the pin 25 secured in the lobes 1.6 and 17. This locking cam is provided with an operating handle member' 26 extending from one side and with a camv surface 27, on its opposite side, the cam surface 27 beingl of such a character that as the handie' 26 is moved from its positiony as shown in Fig. 2 to its position as shown in Fig. 8 with the blade as illustrated, the cam surface 27 will work down upon and co-aict with the upper surface 28 of the projection 22 so as to lock this projection 22 and consequently the whole blade in position between the bottom 13 and the cam surface 27. The' handle member 26 of the locking cam is preferably made of' a yieldable material such as sheet metal and this can be accomplished by making the whole cam construction, including the handle member of a sheet metal stamping and the length of the handle 26 and the positioning ofA the pivot pin 25 is such that the outer endV 2S) of the; handle 26 is brought against the curved outer end 18 of the lobe 16 so that the handle will be flexed in the same direction as is this curved outer end 18, thus locking this handle member in its operative position as shown in- Fig. 3.

In the embodiment illustrated in the drawings, I have shown the outer end 2- ofthe handle member also as curved in the same general direction as is the portion 18 of the'lobe 16 but to a lesser degree so that the locking engagement ofthe outer end of the handle member 26' am* the curved outer portion 18 of the lobe 16 is in thisy manner also attained. This difference iu the curvatures of the parts 29 and 18 is illustrated in dotted lines at 29 in Fig. 4.

For the purpose of preliminarily holding the blade 15 in its predetermined position, I space those portions of the walls 1l and 12 adjacent the pile wire 9 so that the blade can be freely inserted therein and removed therefrom but cause these walls to converge gradually towards their outer end so that as the blade is inserted in the inner portion of the channel 14 and then moved along in the channel toward the outer end of the part 10 a gripping engagement between the blade and the walls 11 and 12 will be attained. In this manner I not only provide for temporarily anchoring the cutter prior to operating the locking cam 26, but I also provide an arrangement which will hold the blade in position, when the locking cam 26 is rendered inoperative.

Upon viewing 2 of the drawing, il will be observed that the upper surface LP; of the projection 22 on blade 15 is substantially parallel to the bottom of the blade 1.5 and tothe bottom of the channel member 1l) and in Fig. 5 I show a modiication in which this upper wall 31 has an incline, he reverse of that of the cutting edge 2i of the blade and in Fig. 6 I show a blade in which this upper surface 312 is inclined similarly lo the cutting edge 21, the coaclion between these reversely inclined surfaces 31 and 312 and the cam will be somewhat different from each other and differ-- ent from that of the cani surface 27 witn the parallel surface 81 of 2.

In order to permit of my blade holder vbeing' employed with the standard forni of pile wire now in use I make the holder lll preferably in lhe form oiI an attachment to the pile wire 9 to be secured to such pile wire in any preferred or desired manner, the line of demarcation between the two being` shown, for example, at 88 in Fig. 1.

lVhen it is desired to insert a blade if in position in the pile wire, the blade is positioned in the channel 14 at the right in Figure 2, as described, and the blade is moved to a position between the cou-verging parts of the walls 11 and 12 where the projection 22 of the blade underlies the cani 24 shown in 2 and 3. A movement of the lever 26 counter-clockwise from its position in Fig. 2 Vlo its position in Fig. f?, not only locks the blade in the holder 10 but also locks the lever in its depressed position of Fig. 3. In this manner I have devised a construction in which the blade can be readily positioned in the holder and removed therefrom and which when positioned in the hol-der is locked securely therein against movement in any direction.

Having thus described my invention and CII illustrated its use, what I claim as new and desire to secure by Letters Patent isl. 'For use in looms for weaving pile fabrics, a pile wire having a seat for a knife blade, and a member arranged for movement relatively to the seat so as to cause portions of said member to be positioned at carrying distances from the seat, whereby as the member is moved relatively to the seat with a blade therebetween the member will engage with the blade to produce a gripping engagement between the seat member and blade, whereby the blade will be held in position on the pile wire against accidental removal.

2. F or use in looms for weaving pile fabrics, a pile wire having a seat for a knife blade and a member arranged for movement relatively to the seat so as to cause portions of said member to be positioned at varying distances from the seat, a blade arranged to be received betweensaid seat and member whereby as the member is moved relatively to the seat, it will prevent portions thereof at gradually decreasing distances from the seat until a gripping engagement between the blade, seat and member results, whereby the blade is held in position on the holder against accidental removal.

3. For use in looms for weaving pile fabrios, a pile wire having a seat for a knife blade, and a member arranged for swinging movement relatively to the seat so as to cause portions of said member to be positioned at varying distances from the seat, whereby as the member is moved relatively to the seat with a blade therebetween the member will engage with the blade to produce a gripping engagement between the seat member and blade whereby the blade will be held in position on the pile wire against accidental removal.

4. For use in looms for weaving pile fabrics,'a pile wire having a seat for a knife blade and a member arranged for movement relatively to the seat so as to cause portions of said member to be positioned at varying distances from the seat, a blade having a projecting portion arranged to be received between said seat and member, whereby as the member is moved relatively to the seat, it will prevent portions thereof at gradually decreasing distances from the seat until a gripping engagement between the blade, seat and member results, whereby the blade is held in position on the holder against accidental removal.

5. For use in looms for weaving pile fabrics, a pile wire having a seat for a knife and a cam pivoted on the wire and arranged to present portions thereof at varying distances from the seat whereby as the cam is moved about its pivot, it will engage a knife blade positioned between it and the seat and cause a gripping engagement between the three, whereby the blade will be held in position on the pile wire against accidental removal.

6. For use in looms for weaving pile fabrics, a pile wire having a seat for a knife blade, and a member arranged for movement relatively to the seat so as to cause portions of said member to be positioned at varying distances from the seat, whereby as the member is moved relatively to the seat with a blade therebetween the member will engage with the blade to produce a gripping engagement between the seat member and blade, whereby the blade will be held in position on the pile wire against accidental removal, said member having an operating portion arranged to lock said member in its operative position.

7. For use in looms for weaving pile fabrics, a pile wire having a seat for a knife and a cam pivoted on the wire and arranged to present portions thereof at varying distances from the seat whereby as the cam is moved about its pivot, it will engage a knife blade positioned between it and the seat and cause a gripping engagement between the three, whereby the blade will be held in position on the pile wire against accidental removaly and means for locking said cam in operative position. i

8. For use in'looms for weaving pile fabrics, a pile wire having a seat for a knife and a cam pivoted on the wire and arranged to present portions thereof at varying distances from the seat whereby as the cam is moved about its pivot, it will engage a knife blade positioned between it and the seat and cause a gripping engagement between the three, whereby the blade will be held in position onthe pile wire against accidental removal and means for locking said cam in operative position to the pile wire comprising a yieldable portion on one of them.

-9. For use in looms for` weaving pile fabrics, a pile wire having a seat for a knife and a cam pivoted on the wire and arranged to present portions thereof at varying distances from the seat whereby as the cam is moved about its pivot it will engage a knife blade positioned between it and the seat and cause ar gripping engagement between the three, whereby the blade will be held in posit-ion on the pile wire against accidental removal, and means for locking said my name.

MARCUSV B. BEHRMAN. 

